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학술지 Multi-Color Broadband Visible Light Source Via GaN Hexagonal Annular Structure
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저자
고영호, Jie Song, Benjamin Leung, Jung Han, 조용훈
발행일
201407
출처
Scientific Reports, v.4, pp.1-5
ISSN
2045-2322
출판사
Nature Publishing Group
DOI
https://dx.doi.org/10.1038/srep05514
협약과제
13VB7300, 의료 및 정밀 가공기기용 자외선(Deep UV) 반도체 레이저 개발, 남은수
초록
Multi-color and broadband visible emission was realized thorough the hexagonal annular structure of GaN. The annular structure fabricated by selective-area growth emitted purple, blue and green color-emission from the multi-facets. The hexagonal annular structure provided various sidewalls of {101} and {112} semi-polar facets, and (0001) polar facet. From the cathodoluminescence study, the (0001) plane had the longest wavelength of 525μnm, and the {101} facet of 440μnm peak wavelength had longer wavelength emission than the {112} of 412μnm peak wavelength. The origin of longer wavelength emission of {101} was mostly due to high In-composition, as well as slightly larger well thickness, which means that {101} facet has higher In-incorporation efficiency. Various In-composition of each facet provided multi-color and broadband emission with the international commission on illumination (CIE) of (0.22, 0.45) and high emission efficiency. The hexagonal annular structure becomes building blocks for highly efficient broadband visible lighting sources.
KSP 제안 키워드
Broadband emission, Building block, Emission Efficiency, Green color, Light sources, Multi-color, Peak wavelength, Polar facets, Selective area growth, Visible Light, highly efficient